Siemens QSA2700D Operator's manual

QSA2700D / QSA2700 / AQS2700
Fine Dust Room Sensor
Basic Documentation
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Building Technologies
2017-12-01 Building Technologies

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Table of Contents
1About this document............................................................................. 3
2Product overview ................................................................................. 5
3Installation........................................................................................... 8
4Configurations ....................................................................................12
5Technical data ....................................................................................17
6 Maintenance.......................................................................................19
7 Air Quality Index classes......................................................................22
8Standard compliance...........................................................................23
9Appendices ........................................................................................24

About this document
Revision history
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1About this document
1.1 Revision history
Edition Date Changes Section Pages
1August. 2017 First version. All
1.2 Reference documents
Ref. Document title Document number
1Mounting instructions A6V11160930
2 Datasheet A6V11160938
You can download the above documents at http://siemens.com/bt/download:
Simply search by document numbers.
1.3 Before you start
This document may be duplicated and distributed only with the expressed
permission of Siemens Ltd.
These documents were prepared with great care.
●The content of all documents is checked at regular intervals.
●All necessary corrections are included in subsequent versions.
●Documents are automatically amended as a consequence of modifications and
corrections to the products described.
Please make sure that you are aware of the latest document revision date.
If you find any lack of clarity while using this document, or if you have any criticisms
or suggestions, please contact your local point of contact (POC) at the nearest
branch office. Addresses for Siemens RCs are available at www.siemens.com/sbt.
Markups
Special markups are indicated in the document as follows:
●Numbered lists and instructions with an operation sequence
1.
2.
Procedures must be performed in the specified order.
[➙ X] Reference to a page number
Symbol identifications
WARNING
This is the symbol for hazard. It warns you of
Risks of injury.
Comply with all
measures designated by this symbol to prevent injury or death.
Copyright
Quality assurance
Conventions for text
marking

About this document
Before you start
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NOTICE
This symbol
identifies an important notice that you should be aware of when you
are using the product.
Before using products from Siemens Industry, Inc., it is important that you read the
documents supplied with or ordered at the same time as the products (equipment,
applications, tools, and so on) carefully and in full.
Before you get started, make sure you have an internet connection, a valid Email
address and a smartphone in hand.
Additional information on products and applications is available:
●From your Siemens branch office www.siemens.com/sbt or at your system
suppliers.
●From the support team at headquarters [e-mail]
if no local POC is available.
Siemens assumes no liability to the extent allowed under the law for any losses
resulting from a failure to comply with the aforementioned points or for the
improper compliance of the same.
Document use/ request to
the reader

Product overview
Type summary
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2Product overview
The fine dust room sensor is designed to measure and transmit indoor
concentrations of PM2.5 and PM10. This wall-mounted product has variants with or
without displays and can connect directly to Siemens BT controllers as well as
many third party controllers via voltage output or Modbus.
2.1 Type summary
Type Order number Description Display
QSA2700 S55720-S457 Room sensor for detection
of PM2.5 and PM10
3-color LED service indication
QSA2700D S55720-S458 Room sensor with LCD
display for detection of
PM2.5 and PM10
2.4-inch color LCD screen for
PM2.5 values, Air Quality Index,
and service
AQS2700 S55720-S459 Sensor module for
replacement
2.2 Contents of QSA2700D and QSA2700
Items Quantity
Fine dust sensor 1
Plastic mounting plate 1
Screws 2 pcs
Mounting instructions 1
2.3 Features
The fine dust room sensor is designed to measure and transmit indoor
concentrations of PM2.5 and PM10.
●0…10 V and Modbus output
●Configurable Modbus parameters
●Plug&play configuration for Siemens ClimatixTM controller
●QSA2700:
– 3-color LED indication for service needs
●QSA2700D:
– 2.4-inch color LCD screen for PM2.5 values and AQI indication
–Energy efficient mode: The screen is off if no one is in front of the sensor
(within 1 m for several minutes)
–Micro USB DC 5V for display
–4 selectable languages: English, Chinese (default), German, French
–3 selectable Air Quality Index classes

Product overview
Device overview
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2.4 Device overview
1Hole for wiring (top) for surface mounting
2 [QSA2700 only]LED
3 [QSA2700D only]LCD display
4(power supply for display only)
5 [QSA2700D only]Proximity sensor
6Push button
7Hole for wiring (bottom) for surface mounting
8Hole for attaching the mounting plate to the housing
9Air outlet
10 Air inlet

Product overview
Normal display overview of QSA2700D
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2.5 Normal display overview of QSA2700D
1Current Air Quality Index (refer to Air Quality Index classes [➙22] for more information)
2Text on the current Air Quality Index

Installation
Mounting requirements
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3Installation
3.1 Mounting requirements
●The sensor is suitable for conduit box mounting, dry wall mounting (with
mounting hole for wires concealed) and surface mounting.
●The recommended height is 1.2-1.5 m above the floor, especially for type with
display.
●Do not mount the sensor in recesses, shelves, behind curtains or doors, or
above heat sources.
●Avoid direct solar radiation.
●Seal the conduit box or the installation tube if any, as air currents can affect
sensor readings.
●Make sure ambient conditions are within 0…50 °C and 5...95% r.h. (no
condensation).
●Do not mount device in places full of oil smog, e.g. in a kitchen.
●Peel off the protective film on air inlet and air outlet before using the device.
●The air inlet and outlet must be free of any blockage, particularly the floc type
of dirt.
NOTICE
High concentrations of cigarette/oil smog in, for example, smoking rooms, may
affect the optical components inside the sensors. We highly recommend replacing
the sensor module at the latest annually in such environments.
NOTICE
Ultrasonic humidifiers can create fine dust from unpurified water that can distort
sensor readings. Do not use in spaces with PM2.5 controlled ventilation.
Mounting position

Installation
Wiring
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●Wire stripper
●Screw driver
●Pencil, level & drill (for dry wall mounting and surface mounting only)
Wires for Specifications
Power supply 0.4 to 1.5 mm2
Analog output 0.4 to 1.5 mm2
Modbus output Twisted pair 0.4 to 1.5 mm2
Length <600m
3.2 Wiring
G, G0: Operating voltage AC 24 V (SELV) / DC13.5…35
V
U1: Signal output DC 0...10 V for PM2.5 0...500 μg/m3
U2: Signal output DC 0...10 V for PM10 0...500 μg/m3
Gu: Signal ground for U1 & U2
+,-, Ref: Modbus signal
Mounting dimensions
Mounting tools
Wire specification

Installation
Installation
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3.3 Installation
1. Separate the housing from the mounting plate using a screw driver.
2. Screw and fix the mounting plate on a conduit box (Conduit box mounting), or
on a wall (Dry wall mounting if there is a mounting hole and the wires are
concealed in the hole; Surface mounting if there is no mounting hole).

Installation
Installation
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3. Connect and screw wires correctly to the terminal. For surface mounting, you
must break out the wiring hole at the top or bottom first.
4. Attach the housing to the mounting plate at the top and then snap on the
housing at the bottom.

Configurations
Modbus configuration parameters
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4Configurations
4.1 Modbus configuration parameters
The sensor is a Modbus (RS485) slave device, configurable via a Modbus master.
Name Range / Enumeration Default
Configurable Address 1...247 1
Baud rate (bps) 1 = 9600 / 2 = 19200/
3 = 38400 / 4 = 57600
19200
Transmission format 0 = 1-8-E-1 / 1 = 1-8-O-1 /
2 = 1-8-N-1 / 3 = 1-8-N-2
0
Basic Parity Even / Odd / No Even
Stop bits 1 / 2 1
Connection <= 32pcs/line
Data 8 bits (0-255)
Identity Slave
Cable length <600m
4.2 Modbus registers
Holding
Register No.
Name Description Default R/W
257 PM2.5 value Range: 0…500 R
258 PM10 value Range: 0…500 R
260 Sensor working status 0: Normal;
1: Replace sensor
module;
2: Communication
error
R
296 Software version Major version R
297 Software version Minor version R
298 Software version Build version R
764 Modbus address 1…247 1 R / W
765 Baud rate 1= 9600bps / 2 =
19200bps / 3 =
38400bps / 4 =
57600bps
2R / W
766 Transmission format (start
bit – data bits – parity –
stop bit)
0 = 1-8-E-1 / 1 = 1-
8-O-1 / 2 = 1-8-N-1
/ 3 = 1-8-N-2
0R / W
768 Bus configuration
command
0 = Ready / 1 =
Load / 2 = Discard
0R / W

Configurations
Push button configuration (QSA2700)
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Remarks:
●The register number is counted from 1.
●In the event the value for register number 764 (Modbus address), 765 (Baud
rate), or 766 (Transmission format) changes, power off the device and turn it on
again to activate the changed value.
●Register number 768 (Bus configuration command) is for ClimatixTM plug&play
configuration.
4.3 Push button configuration (QSA2700)
Press the push button to automatically reset and configured via ClimatixTM
controllers with pre-programmed plug&play configuration.
Press the button for LED Action More details
1…5 s Constant red Keep pressing
5…10 s LED off Release the button to
configure the device via
the Climatix™ controller
LED flashes for 30 s
after you release the
button, waiting for the
configuration via
Modbus:
●If successful, the
LED flashes green
for 60 s, then turns
to constant green
●Otherwise, the LED
turns back to its
original state
10…13 s Flash yellow Release the button to
reset the device
Release the button
while the LED still
flashes yellow. The LED
keeps flashing yellow
for 3 s, then turns red
for 1s, before turning to
permanent yellow (the
reset is complete).
>13 s Returns to the initial
status
Resetting cancelled
4.4 LED colors and patterns (QSA2700)
Color Pattern Description
Green Permanently on Working properly, Modbus configured
Yellow Permanently on Working properly, Modbus with factory settings
Red Permanently on Error 1, replace sensor module
Red Flashing (0.5 s on / 0. 5 s off) Error 2, communication error
Red / yellow Flashing (0.5 s red / 0. 5 s yellow) Possible inaccurate measurement

Configurations
Initial setup (QSA2700D)
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4.5 Initial setup (QSA2700D)
Step Description Picture
1. Power on the device: Page 1 is displayed.
Short press the push button to select the
language.
Long press the push button (>2 s) to save the
selection.
Page 1
2. Short press the push button to enter page 2 .
Short press the push button to select among the
different classes.
Long press the push button (>2 s) to save the
selection.
Tip: refer to Air Quality Index classes [➙22] for
more info about AQI.
Page 2
3. Short press the push button to enter page 3 .
Page 3
4. Short press the push button to enter page 4 .
Scan the QR code for the link to download the
document.
Page 4
Note: If the device powers off during the initial setup (steps 1-3), restart at step 1.

Configurations
Change language (QSA2700D)
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4.6 Change language (QSA2700D)
Step Description Picture
1 Short press the push button to reach page 7 .
Then, long press the push button (>2 s) to enter
page 8 .
Page 7
2
Short press the push button to select a
language.
Then, long press the push button (>2 s) to save
the selection.
Page 8
4.7 Change Air Quality Index class (QSA2700D)
Step Description Picture
1 Short press the push button to reach page 9 .
Then, long press the push button (>2 s) to enter
page 10.
Page 9
2
Short press the push button to select an Air
Quality Index class.
Then, long press the push button (>2 s) to save.
Page 10
4.8 Modbus configuration (QSA2700D)
Press the push button to automatically reset and configured via ClimatixTM
controllers with pre-programmed plug&play configuration.

Con
figurations
Modbus configuration (QSA2700D)
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Step Description Picture
1From
page 3 , long press the push button (2…10
s) to enter page 5
Page 3
3
Long press the push button (>2 s) to enter page
6 :
Note: A short press returns to page 3.
Page 5
4
Short press the push button to select “Configure
via Climatix” or “Reset Modbus settings” on page
6 .
Note: Ensure that the device is properly
connected to a ClimatixTM controller that is pre-
programmed with the plug&play feature.
Page 6
4.1 When “Configure via Climatix” is selected;
long
press the push button (5…10 s) to activate the
function.
Page 6
4.2 When “Reset Modbus Settings” is selected;
long
press the push button (> 10 s) to activate the
function.
Page 6

Technical data
Power supply
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5Technical data
5.1 Power supply
Operating voltage AC 24 V ±20% / DC 13.5…35 V
Frequency 50 Hz @ AC 24 V
5.2 Functional data for PM2.5
Measuring range 0…500 μg/m3
Unit to unit variability
Analog output signal, (terminal U1)
Max of ±15 μg/m3and ±15% of reading @ 25 °C and 50%
r.h.
DC 0...10 V, linear, corresponding to 0...500 μg/m3
5.3 Functional data for PM10
Measuring range 0…500 μg/m3
Unit to unit variability
Analog output signal, (terminal U2)
Max of ±15 μg/m3and ±15% of reading @ 25 °C and 50%
r.h.
DC 0...10 V, linear, corresponding to 0...500 μg/m3
5.4 Connections
Interface
Micro USB Power connection for display only
Wiring connections
Screw terminals Solid wires or prepared stranded wires:
0.4...1.5 mm2
Slotted screws Size 1, tightening torque 0.6 Nm (0.44 lb-ft).
Wiring lengths for signals. 600 meters
5.5 Housing protection class
Degree of protection of housing IP30
5.6 Operation conditions
Temperature
Humidity
0…50 °C
5...95% r.h. (no condensation)

Technical data
Storage and transportation conditions
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5.7 Storage and transportation conditions
Temperature
Humidity
-20…70 °C
0…95% r. h. (no condensation)
5.8 Standards
Electromagnetic compatibility
Immunity
Emissions
CE standard EN 60730-1
EN 61 000-6-2
EN 61 000-6-3
EU conformity declaration A6V11277342 *)
*) The document can be downloaded at http://siemens.com/bt/download.
5.9 General data
Color White
Weight 140 g
5.10 Display (QSA2700D)
Screen Color, no touch
Working status Only active when people in front within 1 m (±10%);
screen turns off after a few minutes if no presence is
detected
Resolution 1 μg/m3increments
Display Display PM2.5 value ( if value > 500 μg/m3, then display
500+ μg/m3)
Air Quality Index corresponding to measured PM2.5
value
Language (selectable) English, Chinese (simplified), German, French

Maintenance
Replacing AQS2700
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6Maintenance
6.1 Replacing AQS2700
Replace the sensor module due to:
●Reaching its end of lifetime: as indicated via LED or LCD, and output signal.
Refer to Troubleshooting [➙21] for the indication.
●The measurement is not as accurate as specified. The sensor still works but is
indicated via LED or LCD. Refer to Troubleshooting [➙21] for the indication.
Sensor module accuracy is influenced by ambient environment. We recommend to
replacing the module every 1 to 3 years depending on the local environment. In
environments with continuously high PM2.5 concentrations (i.e. greater than 300
μg/m3, e.g. a smoking room), replace the module more often.
To replace the sensor module:
1. Detach the housing from the mounting plate using a screw driver.
2. Take off the module by hand and replace it with a new one.

Maintenance
Proximity sensor (QSA2700D)
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NOTICE
Turn off the device
before replacing the sensor module.
If not possible, insert a new sensor module 10 s after the old one is removed.
6.2 Proximity sensor (QSA2700D)
QSA2700D includes a built-in proximity sensor and enters into energy efficient
mode if no person is detected in front of the sensor (approximately 1 m) over the
past few minutes. In energy efficient mode, the screen is off and the sensor is
working and transmitting the signals at regular intervals. Otherwise, the screen is
activated and the sensor is in continuous working mode.
Keep the proximity sensor area clean as dirt may affect the detection performance.
1Proximity sensor